Noise reduction for spectroscopic signal processing
Patent 7429860 Issued on September 30, 2008. Estimated Expiration Date: January 27, 2024. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
324/307, Using a nuclear resonance spectrometer system324/312, By spectrum storage and analysis324/311, With signal decoupling700/94Digital audio data processing system
A windowed noise reduction technique is presented that allows a noise-reduced spectrum of satisfactory accuracy to be recovered from original noisy spectroscopic data, while acquiring a significantly reduced number of transient acquisitions. The signal-averaged, decimated signal is written as a sum of a noisefree component and a noise component, and a vector space that contains a noisefree subspace and a noise subspace is created using these decimated signals. A correlation matrix is constructed in this vector space, and diagonalized to yield the singular values. The appearance of a clear gap between the noisefree singular values and the noise singular values, in a singular value graph, and the stability of the gap, supplies the criteria for determining that a sufficient number of iterations has been performed.
Other References
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Haimovich et al., “An Eigenanalysis Interference Canceler”, IEEE Transactions on Signal Processing, vol. 39, No. 1, Jan. 1991, pp. 76-84.
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January 27, 2024. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
